A 3-Year Results of Application a Combined Scale Inhibition and Hydraulic Fracturing Treatments using a Novel Hydraulic Fracturing Fluid, Russia

Abstract

Scale deposits are a common problem in oil and gas wells and can have detrimental effects on well production. Depending on the severity, scaling can stop production entirely as scale forms anywhere in the well production system, including the formation, perforations, casing or tubular, and in or on the artificial lift equipment. There are several chemical and mechanical methods for removing scale deposits. However, to prevent scale deposition, the only solution is chemical inhibitors injected into the formation. The typical production system includes artificially lifted, stimulated wells (propped hydraulic fractures) placed in reservoirs where pressure maintenance is achieved by water flooding. The artificial lifting is typically accomplished through use of electric submersible pumps (ESPs). In reservoirs where produced fluids exhibit scaling tendencies, ESP run life is significantly shortened by scale formation on the pump elements restricting rotation. By treating the formation with chemical inhibitors, the life of the ESP can be extended. In this paper we provide approaches for improving a compatibility of a novel hydraulic fracturing fluid (used in Russia) and scale inhibitor. A 3-year campaign to combine scale inhibition with the hydraulic propped fracture effectively increased the average run life of ESPs in the Mayskoe and Snezhnoe oil fields.

Re-fracturing Considerations of Horizontal Well Multi Stage Fractured Completions in Mid Permeability Formations

“…Frac over flush is deemed detrimental to production in mid perm reservoirs; • Poor frac spacing; Spacing is based on best gamma ray and resistivity logs without taking into account stress profile; • Frac pinching out under stress; wellbore trajectory is not necessary allocated in the most preferable zone, and fractures may be not sufficiently propped to remain open in high stress layers; • Workover operations (plugged fractures, plugged frac-ports); Poor work over practice in combination with low reservoir pressure has been documented to inflict serious post frac damage; • Frac scaling up (9) and conductivity deterioration over time;…”

Application of New Corrosion Inhibitor Foroilfield Equipment and Pipelines for Improving the Ecological Security

“…It can be noted that the use of inhibitors is one of the most effective ways to protect equipment and pipelines from internal corrosion. As a result, the development of new multifunctional inhibitors remains relevant [17][18].…”

Study of the Effect of a New Combined Inhibitor and a Permanent Magnetic Field on Corrosion and Salt Deposition

“…It is imperative to select an effective inhibitor in accordance with the operating parameters of the wells and the chemical composition of layer water once choosing technology for prevention from corrosion and salt precipitation [10][11][12]. From this reason, production of effective inhibitors prepared from multicomponent mixtures for prevention against corrosion and salt deposition becomes necessary.…”